Bug 2367538 (CVE-2025-37937)

Summary: CVE-2025-37937 kernel: objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-20 16:02:58 UTC 
In the Linux kernel, the following vulnerability has been resolved:

objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds()

If dib8000_set_dds()'s call to dib8000_read32() returns zero, the result
is a divide-by-zero.  Prevent that from happening.

Fixes the following warning with an UBSAN kernel:

  drivers/media/dvb-frontends/dib8000.o: warning: objtool: dib8000_tune() falls through to next function dib8096p_cfg_DibRx()
Comment 1 Jon Moroney 2025-05-20 23:54:20 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052044-CVE-2025-37937-3de0@gregkh/T